Dobby cylinder



Aug. 23, 1927. 1,639,826

W. M. WATTIE DoBBY CYLINDER Filed March 27. 1926 i o l I /v VEN Tale IWATT/E Y f/. '/f?? Patented Aug. 23, 1927.

UNITED STATES" 1,639,826 PAT-ENT QFFICE.

WrLLrAM M. WATTIE, OE WORCESTER, lvrAssACnr-ISETTS, Assrenon ToCROMT'TON ef KNOWLES LOOM WORKS, OE WORCESTER, MASSACHUSETTS, ACORPORATION OE MASSACHUSETTS.

rlhis invention relates to improvements in the cylinder. yof thewell-known Knowles head and it is the principal object of the inventionto construct the cylinder ot reversible parts so VIt is a further objectof my invention to` provide a cylinder formed in .partby a mandrelnon-circular in cross section to receive correspondingly formedlaminations` having' a blank and a toothed area` the toothed area lyingsymmetrically with re spect to the non-circular portion Ol' thelaminations so that Awhen the sections are reversed the toothed sectionwill occupy the same relative angular position with respect to themandrel.v n

lli-fith these and other objects in view which will appear asthedescription proceeds, myY invention resides in the combination andarrangement O parts hereinafter described and set forth in the claims. y

In the accompanying ydrawings wherein I have shown aconvenientembodiment of my invention, i

Fig. l is a vertical section through a portion' of the well-knownAKnowles head of the 4-typ'e Shown in patent to Knowles No.1

136,350, showing -thecylinders made accor ing to -my invention,`

Fig, 2 1s an enlarged section on line `2--2v or" Fig. 1,

Fig. 3 is an enlarged side elevation of the cylinder taken in thedirection of arrow 3,V

Fig. 1,

Fig. 4 is a front view of one of the laminations shown in Fig. 3afterthe leading tooth ot the saine has become worn, and

Fig. 5 is a fragmentary view 'of the lamination shown in Fig. 4 lbutshowing the same reversed with the worn part of the tooth at thefinishing end of the section of teeth.

Referring more particularly to the' drawings it will be seen that I haveprovided loom arches 10 having a head trame 11 secured thereto in whichis securedI a heel pin 12. Vibrator levers 13,`one of which is shown inthe drawings, are .pivoted on the heel pin 12 and there is mounted .oneach vibrator for limited rotation ay vibrator gear 14 pivc otallyconnected as atv15 to one end Oi a connector The other end o'e'acli comDOBBY CYLINDER.

Application filed March 27, 1926. Serial No. 98,016.

tively, which form the subject matter' ofV my present invention andinasmuch as both cylinders are alike as far as my present invention isconcerned, but one will be described;

As shown more particularly in Figs. 2 and 3, each cylinder is providedwith a mandrel 32 having a flattened portion 33 and having extendingtherethrough a driving shaft 34 formed `with lflanges 35 and 36,respectively,

lying at the yOpposite yends Ot the mandrel and. engaging the'interior'surface thereof.

'- Flange 35 grooved as at 37 to receive a holding screw 38 threadedthrough one end Ot "the mandrel and by means of' which the mandrel isheldin xed angular relation with respect to .the shaft 34. i

Said mandrelis provided with a shoulder 39 near one end thereotwhichforms a backing for a series 'of laminated sections 40 shown more'particularly lin Figs. Q/and 4. Each of said sections is provided witha blank peripheral area '41 and a'toothed area y42.*and is provided withan opening 43 corresponding' :in-size and shape to the crosssectionofthat part of the mandrel designed to receive said sections.l Thelaminations are provided with openings 44 to receive tie rods 45 whichextend'therethrough and alsofshoulder 39 to hold the laminations orsections 40 Securely -to the: mandrel 39.. It will be noted that thetoothed larea of the lamina/tions land the flattened surface 46 aresymmetrical with respect to a diameter which passes through the openings44. y

. Under normal yOperation the shaft 34 is driven (by mechanism not shownbut similar to that setforth in the aforesaid .patent to Knowles)` andthe cylinders 30 and 31 are rotated constantly-in Opposite directions asindicated by the `arrows in Fig. 1. Asshown in said ligurethevbratorlevere are down so that the vibrator' gears 14 are in positionIl will be seen that the vibrator gear is provided with a blank space 51formed by omit-Y ting one tooth on the vibrator gear and as the leadingtooth of the cylinder becomes worn the teeth thereof will not registercorrectly with the teeth of the vibrator gear 14. Vhen this conditionarises it is necessary merely to reverse the laminations 40, turningthem from the position shown in Fig. 4 to that shown in Fig. 5 where itwill be seen that the tooth 52 which was formerly the last tooth of thesection is now the leading tooth. The surface of the new leading toothwhich is now in position to engage the vibrator gear did not havedriving connection with thelatter before the reversal so that it is asoriginally formed and the teeth of thecylinder and the vibrator gearwill mesh properly. Inasmueh as the'toothed section 42 and fiattenedsurface 46 are symmetrically disposed with respect to a diameter passingthrough the bolt holes 44 and the diameter of the cylinder thelaminationsmay be reversed without disturbing the proper position of thetoothed sections. f

From the foregoing it will be seen that I have provided a multi-partcylinder for the well-known Knowles head so formed that when the leadingor vibrator gear engaging tooth becomes worn the sections or laminationsmay be reversed to present a subst-antially new and unwornV toothedsurface to the vibrator gears. While I haveshown a comparatively largenumber of laminations yet it is to be understood that I am not limitedto the thicknessor number of laminaparts is permissible because of thefact that the toothed section and the iiattened surface' on the interiorof each of the laminations is symmetrical withl respect to a diameterthereof passing through'the bolt holes 44.

IIaving thus described my invention it will be apparent that, changesand modifications may be made therein by those skilled in the artwithout departing from the spirit and scope ofthe invention, and Ido'not wish to he limited to the details herein disclosed, but what Iclaim is:

l. In a loom Vpattern mechanism having a vibrator lever and a vibratorgear therefor, a cylinder to actuate. the vibrator gear, said cylinderhaving a reversible element thereon a portion of which is provided withteeth to engage the gear and a portion of which is blank, and positivedriving connections between the element and the cylinder, the teeth ofthe element and the driving connection thereof between the same andthecylinder being symmetrical with respect to a diameter of the element tothe end that said element. may be reversed on the cylinder andhave thetoothed section in the same relative angular position with respect tosaid cylinder and vibrator gear. i

2. In a loom pattern mechanism havinfr a vibrator lever and a vibratorgear therefor, a. cylinder to actuate the gear, said cylinder having a.lnon-circular mandrel, anda plurality of laminations thereon havingnon-cin' vibrator lever and a vibrator gearA therefor,V

a cylinder to actuate the gear, said cylinder having a rotating mandrel,a series of laminations for the mandrel, each lamination having aportion only of the peripherythereof provided with teeth, and meansdefining a driving connection between the mandrel and Htl thelaminations, said means and the toothed section of the vibrator lyingsymmetricallyv with respect to a diameter of the laminations to the endthat said lamination may be re-l versed on the cylinder and have thetoothed section inthe same relative angular posi tion with respect tosaid cylinder and vibrator gear.

4. Ina loom pattern mechanism having a vibrator lever anda vibrator geartherefor,

cylinder for the vibrator gear normally constantly driven in the samedirection, a mandrel forming part of the cylinder, aremovable element onthe mandrel, said element having-a section of teeth on a portion only ofthe periphery thereof, means extending through the elementand a portionof the mandrel to hold the element to said mandrel,

said means and the toothed sectionof the' element being symmetrical withrespect to a diameter of the elementrto the end Ythat said element maybe reversed on the cylinder and have the toothed section in the same Arelative angular position with respect to said cylinder y and vibrator Ygear.

5. In a loom lpattern mechanism having a n tion which interrupts thecircular form of the opening so that said laminations lit snugly on themandrel, bolts extending parallel to the axis of the cylinder throughthe laminations and a portion of the mandrel, and a section of teethformed on each lamination extending over a portion only of the peripheryof the laminations, the flattened portion of the mandrel and openinginthe lamination, the section of teeth of the laminations and the boltsall being symmetrically disposed With respect to a diameter of thelaminations,i\vhereby the laminations may be reversed and maintain thesame angular relation with respect to the cylinder and vibrator gear.

6. A cylinder for a loom head motion having a vibrator gear, saidCylinder Comprising a mandrel and a plurality of laminations thereon,each lamination having teeth eX- tending around a portion only of theperiphery thereof, said laminations being reversible on the mandrel toassume the same angular position with respect to the mandrel andvibrator gear as existed before the reversal,

said laminations and central portion having engaging non-circularportions.

7. A cylinder for a loom head motion having a vibrator gear, saidcylinder comprising a mandrel partly circular and partly non-circular incross-section, a shoulder formed integral with the mandrel, a pluralityof laminations mounted on the mandrel, each lamination having a toothedarea and a blank area and each lamination having an opening therethroughhaving circular and non-circular portions to fit snugly over themandrel, and securing means extending longitudinally of the cylinderpassing through the laminations and the shoulder.

8. A cylinder' for a loom head motion having a vibrator gear, saidcylinder comprising a mandrel partly circular and partly non-circular incross-section, a shoulder formed integral with the mandrel, a pluralityof laminations mounted on the mandrel, each lamination havingV a'toothed area and a blank area and each lamination having an openingtherethrough having circular and non-circular portions to fit snuglyover the mandrel, and securing means eX- tending longitudinally of thecylinder pass- 'ing throughthe laminations and the shoulder, the toothedportions of the laminations and non-circular portion of the mandrel allbeing symmetrically disposed with respect to a diameter of the mandrel.

In testimony whereof I have hereunto affixed my signature.

VILLIAM M. WATTIE.

